light tinting is needed. separate tint options for dim and bright light. this would allow a DM to place typical lights in areas, but then place dim lights with invisible emitters and tinting so that the shadows from the bright lights are not 100% opaque.
light sources should blend, such that two or more dim sources overlapping should create full brightness.
night vision currently works pretty good. I use a dark purple tint so its not producing the same effect as bright light.
the strength of dim light should be adjustable - but tinting would again solve this problem.
tinted light should blend colors, not overlap colors - there's a difference!
shadows should be gradable - but tintable dim lighting would solve this problem.
MAKE LIGHT TINTABLE.
PS: we also need movement barriers that are not light barriers.